凤凰城（City）目前运营着四座常规水处理厂（WTP）。这座城市 更新其水质总体规划（WQMP）。WQMP更新研究的初始阶段 建议修改当前的处理流程，以实现强化混凝（EC） 并加入其他处理工艺，如颗粒活性炭（GAC）过滤器 所有城市污水处理厂的吸附器和臭氧。为了制定设计和操作标准 对于GAC过滤吸附器和中间臭氧氧化（过滤前臭氧氧化），城市 资助了一项试点研究，该研究在2002年12月至2002年12月的七个月期间进行 2003年6月。本文总结了这项试点研究的主要发现。 试点测试的主要目标是: GAC过滤器吸附器能否帮助遵守2级D/DBP规则 要求； GAC过滤吸附器可接受的过滤介质深度是多少； 用不含氯的水反洗有什么好处；和 在GAC过滤器吸附器之前使用臭氧有什么好处？为了实现上述目标，在盐河项目亚利桑那运河附近修建并运营了一个试点设施。 这个试验设施有11个过滤器；每个过滤器的直径为3英寸（英寸） 身高15英尺。11个过滤器中的6个接收工厂沉淀水（SW），其余5个过滤器接收工厂沉淀水（SW） 过滤器接收臭氧沉淀水（OSW）。先导过滤器充满了不同的介质 其中包括无烟煤（A）/沙子（S）、沥青GAC（GAC-B）和褐煤GAC（GAC-L）。 试验研究中使用的GAC为8x20目（美国筛），具有有效的 尺寸为1.0-1.2毫米（mm），均匀系数小于1。 5.处女重新聚集 本研究使用了从国内领先制造商处获得的GAC培养基。SW和OSW用作先导过滤器的给水。大量使用臭氧 沉淀水中每毫克TOC中0.5毫克臭氧的比率。SW的平均TOC 范围为1-3 mg/L，因此臭氧层的臭氧剂量范围为0.5-1.5 mg/L 剂量为0.5-1.5 mg/L时，未观察到明显的TOC去除。臭氧氧化降低了温度 平均比紫外线吸收率（SUVA）为1。 西南9英寸至西南1.4英寸。溴化物 SW中的浓度在80到110 Au/L之间。低臭氧剂量和中等臭氧剂量 臭氧氧化pHs导致溴酸盐的生成低于方法检测限（MDL）5 微克/升（Au/L）。 定期监测试点进水和过滤水的现场参数，如pH， 浊度、温度、254纳米（nm）波长的紫外线（UV）吸光度、臭氧 OSW中的残余物和反冲洗水中的余氯。 此外，还收集了样本 并送往认证实验室进行TOC、异养平板计数（HPC）分析， 溴化物、溴酸盐、三卤甲烷、HAAs以及味道和气味（T&O）化合物。模拟的 分配系统（SDS）THMs和HAAs通过将样品氯化至 2天和5天结束时，分配系统的目标氯残留水平为0.5-1.5 mg/L- 天。2天和5天对应于该城市的平均和最大水龄 分配系统。 结果和讨论分为四个部分，与四个目标相对应。包括表格、数字。

The City of Phoenix (City) currently operates four conventional water treatment plants (WTP). The City is updating its Water Quality Master Plan (WQMP). The initial phase of the WQMP update study recommended modifying the current treatment processes to achieve enhanced coagulation (EC) and incorporating additional treatment processes such as granular activated carbon (GAC) filter adsorbers and ozone at all the City WTPs. In order to develop the design and operating criteria for GAC filter adsorbers and intermediate ozonation (ozonation before filtration), the City funded a pilot study that was performed over a period of seven months from December 2002 to June 2003. This paper summarizes the key findings of this pilot study. The key objectives of the pilot testing were: can GAC filter adsorbers assist in complying with the Stage-2 D/DBP Rule requirements; what is the acceptable filter media depth for the GAC filter adsorbers; what are the benefits of backwashing with unchlorinated water; and, what are the benefits of applying ozone prior to the GAC filter adsorbers? To address the above objectives, a pilot facility was constructed and operated adjacent to the Salt River Project's Arizona Canal. This pilot facility had 11 filters; each filter was 3-inches (in) in diameter and 15 feet (ft) tall. Six of the 11 filters received plant settled water (SW) and the rest of the five filters received ozonated settled water (OSW). The pilot filters were filled with different media that included anthracite (A)/sand (S), bituminous GAC (GAC-B) and lignite GAC (GAC-L). The GACs that were used in the pilot study were of 8x20 mesh size (US Sieve) with an effective size of 1.0-1.2 millimeters (mm) and uniformity coefficient of less than 1.5. Virgin reagglomerated GAC media obtained from a leading national manufacturer was used in this study. The SW and OSW served as the feed waters to the pilot filters. Ozone was applied at a mass ratio of 0.5 mg of ozone per mg of TOC in the settled water. The average TOC of the SW ranged from 1-3 mg/L and therefore the ozone dose ranged from 0.5-1.5 mg/L. At the ozone dose of 0.5-1.5 mg/L, no significant TOC removal was observed. Ozonation lowered the average specific ultraviolet absorbance (SUVA) from 1.9 in SW to 1.4 in OSW. The bromide concentration in SW was between 80 and 110 Au/L. The low ozone dose and the moderate ozonation pHs resulted in bromate formation at less than the method detection limit (MDL) of 5 micrograms/liter (Au/L). The pilot influents and filtered waters were routinely monitored for field parameters such as pH, turbidity, temperature, ultraviolet (UV) absorbance at 254 nanometers (nm) wavelength, ozone residual in OSW and chlorine residual in backwash water. Additionally, samples were collected and sent to certified laboratories for analysis of TOC, heterotrophic plate counts (HPCs), bromide, bromate, THMs, HAAs and taste and odor (T&O) compounds. The simulated distribution system (SDS) THMs and HAAs were measured by chlorinating the samples to targeted distribution system chlorine residual levels of 0.5-1.5 mg/L at the end of 2-days and 5- days. The 2-days and 5-days correspond to the average and maximum water ages in the City's distribution system. The results and discussion are presented in four sections that correspond to the four objectives. Includes tables, figures.